package com.dmjj.cadcommon.util;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;

/**
 * @author 王丽凯
 * @Description: TODO
 * @Title: IPInfoUtil
 * @ProjectName dmjj-parent
 * @date 2019/1/13
 */
public class IPInfoUtil {

    public static String getIpAddr(HttpServletRequest request){
        String ip = request.getHeader("x-forwarded-for");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
            ip = request.getRemoteAddr();
            if (ip.equals("127.0.0.1")){
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                }catch (Exception e){
                    e.printStackTrace();
                }
                ip = inet.getHostAddress();
            }
        }
        //对于通过多个代理，第一个为IP为客户端真是IP，多个IP按照"," (网上说的)
        if (ip != null && ip.length() > 15){
            if (ip.indexOf(",")>0){
                ip = ip.substring(0, ip.indexOf(","));
            }
        }
        if ("0:0:0:0:0:0:0:1".equals(ip)){
            ip="127.0.0.1";
        }
        return ip;
    }
}
